Brand: Allstar Performance Manufacturer's Part Number: ALL31100 Part Type: Water Pumps, Mechanical Product Line: Allstar Performance Water Pumps Automotive Fittings Part Number: AAF-ALL31100 UPC: 848238019209 Pump Flow: Standard-volume Water Pump Rotation: Clockwise Pilot Diameter (in.): 0.625 in. Pump Material: Aluminum Pump Color: Natural Water Pump Style: Short Remanufactured: No Quantity: Sold individually. Notes: Not recommended for use with mechanical fans over 5,000 RPM. May need to be clearanced for use with 8 in. dampers. Description: Water flow is essential to the cooling demands of your car engine—its efficiency depends on it, in fact. Allstar Performance water pumps are designed to spin the flow of water at idle to cool things down. An overheating problem rarely shows up when you're cruising down the road. Ironically, it will rear its ugly head when you pull up to a stoplight. These unique aluminum pumps disperse the heat quickly and adjust water flow to the engine evenly. Experience the comfort and performance results of moving sufficient water through your system for better cooling. Order the pilot shaft diameter needed for your application.